Studies on the readability and on the detection rate in a Mach–Zehnder interferometer-based implementation for high-rate, long-distance QKD protocols

Papapanos, Christos; Zavitsanos, Dimitris; Raptakis, Adam; Giannoulis, Giannis; Kouloumentas, Christos; Avramopoulos, H.

doi:10.1140/epjd/s10053-021-00078-8

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…where e d is the baseline system error rate which does not include the afterpulse phenomenon. [37] In the numerical simulation, we can derive n α,k and n α,k (α ∈ {Z, X}) by…”

Section: Security Analysesmentioning

confidence: 99%

“…Several schemes that analyze the impact of afterpulse on QKD have also been proposed. [35][36][37] Since the secret key rate in the practical protocol is limited, it is necessary to reconsider the security bound of the asymptotic region, and several methods based on finite-length key have been given. [38][39][40] These imperfections will lead to the correlation of detection results.…”

Section: Introductionmentioning

confidence: 99%

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Finite-key analysis of practical time-bin high-dimensional quantum key distribution with afterpulse effect

Zhou¹,

Zhou²,

Wang³

et al. 2022

Chinese Phys. B

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High-dimensional quantum resources provide the ability to encode several bits of information on a single photon, which can particularly increase the secret key rate rate of quantum key distribution (QKD) systems. Recently, a practical four-dimensional QKD scheme based on time-bin quantum photonic state, only with two single-photon avalanche detectors as measurement setup, has been proven to have a superior performance than the qubit-based one. In this paper, we extend the results to our proposed eight-dimensional scheme. Then, we consider two main practical factors to improve its secret key bound. Concretely, we take the afterpulse effect into account and apply a finite-key analysis with the intensity fluctuations. Our secret bounds give consideration to both the intensity fluctuations and the afterpulse effect for the high-dimensional QKD systems. Numerical simulations show the bound of eight-dimensional QKD scheme is more robust to the intensity fluctuations but more sensitive to the afterpulse effect than the four-dimensional one.

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“…where e d is the baseline system error rate which does not include the afterpulse phenomenon. [37] In the numerical simulation, we can derive n α,k and n α,k (α ∈ {Z, X}) by…”

Section: Security Analysesmentioning

confidence: 99%